Error while importing data: Error while mutating Uid: [4600006] cannot be greater than lease: [0]

Users Dgraph
2

Oh, I tried the hint from this topic: Uid: [24387] cannot be greater than lease: [0] - #6 by chenchuangwei6

But

curl http://zero:6080/assign?what=uids&num=10000000

results in

{"errors":[{"code":"ErrorInvalidRequest","message":"num not passed"}]}